It's easy to pass by the Palais-Royal in Paris's first arrondissement; there is so much around it of note, and visitors are either rushing past to get to the Louvre, or wiped out after an afternoon at that world-famous museum. But its gardens, which are free and open to the public, are an oasis in this otherwise tourist-heavy neighborhood that's practically hidden in plain sight – so keep it in mind when you want to take a load off after trekking through the Louvre.
Originally the home of Cardinal Richelieu, it was built in the 1630s and after the Cardinal's death fell into the hands of King Louis XIII. Today it is the location of the Ministry of Culture and a branch of the National Library.
The Palais-Royal is on the Right Bank, directly across the street from the Louvre on the Rue de Rivoli. Take the M7 to Palais-Royal and Musée du Louvre!